Region-free. Will work on UK/EUR/US consoles.
Sonic 2 Recreation is a version of Sonic the Hedgehog 2 (16-bit) by redhotsonic. It sports an ASM overhaul, multiple characters, new zones, a new boss, a new DAC driver that supports many different sound features, new zone art, etc.
(This label print quality isn't the best and does have some streaks)